@misc{indiciae6f2ed7dbc017,
  title = {Geologic map of the Mackville quadrangle, central Kentucky},
  author = {Warren Lee Peterson},
  year = {1977},
  doi = {10.3133/gq1378},
  url = {https://pubs.usgs.gov/publication/gq1378},
  note = {Source identifier: gq1378}
}